Muffler.



H. S. HALL. MUFFLER.

APPLIGATION FILED JAN.25,1912.

unirsi) strATizs PATENT onirica.

HERMAN SKERBY HALL, OF MALDEN, MASSACHUSETTS, ASSIGNOR TO THE VAPO COMPANY, 0F BOSTON, MASSACHUSETTS, A CORPORATION 0F MASSACHUSETTS.

MUFFLER.

Speccation of Letters Patent.

Patented Aug. 19,1 913.

, may be readily cleaned.

A further object of my invention is to provide a muiller in which the cooling Water is readily spread over a large area and swept out of the muffler at each. explosion.

A further object of my invention is to provide a muiller of such interior shape that the exhaust gas will obtain a rotary movement and will pass from the muiller tangentially.

A further object of my invention is to provide a water drain which becomes effective when the muiiler is in such tilted position that water cannot be ejected through the outlet.

Reference is to be had to the accompanying drawings, forming a part of this speciiication, in which similar characters of reference indicate corresponding parts 'in both the figures, and in which- Figure 1 is a plan view looking down upon a preferred embodiment of my invention, a portion of the head being broken away to show the upper baille plate, and Fig. 2 is a transverse sectional view taken on the line 2-2 of Fig. 1.

Described more in detail, my muiiler 1s, roughly, in the shape of a sphere, and consists of two hollow semi-spherical halves, an upper half 3, and a lower half 4, the :neeting edges of which are formed into projecting flanges 5, suitably fastened together'by means of screws 6, with a suitable gacking 7 interposed between the langes 5. ne side of the upper half 3 has extending therethrough, a suitable inlet 8, and extending from the bottom of the bottom 4 is a suitable outlet 9. In Fig. 2, the inlet 8 and the outlet 9 are in the same plane, but due to' the fact that the muiller is in two parts, the line of the inlet may be varied from the line of the outlet, by passing the screws 6 through suitably drilled holes in the abutting flanges 5 of the two halves. It will be noted that the outlet 9 'is substantially at the bottom 10 of the muier, and, as shown in Fig. 2, this bottom wall gradually slopes down to the outlet, thereby facilitating the draining of the water therefrom.

Threaded into the ytop of the upper haii l 3, is a water pipe 11, threaded-to the lower end of which and within the muiller, is a distributing nipple 12, slightly projecting into which nipple is the upper central portion of a perforated dome or baille plate 13, the perforations 14 of which extending therethrough, are of greater cross-sectional area on the under side of the baffle than at the top side, thereby forming apertures in the shape of frustums of cones. This dome 13 is centrally supported by means of a pipe 15, which pipe has its lower end in screwthreaded engagement at 16 with the center of the bottom 10, land has just above the level of the bottom 10, a series of outlet apertures 17, adapted to ail'ord adrain for surplus water that might accumulate on the bottom 10 when the muiller is tilted in such position that the water is not forced through the outlet 9.

Usually the one baille plate 13 is suilicient, but,.if desired, an auxiliary baille plate 18 may be supported on the pipe 15, below the dome 13, which baille may be of the ilatperforated construction shown in Fig. 2, or, if desired, may be concave to assume a position indicated by the dotted lines in Fig. 2, or a plurality of these plates may be used.

By the above outlined construction, it will be seen that the water passing through the pipe 11 is distributed over the dome 13 in a relatively thin layer, s0 as -to cool the exhaust and keep the muiller itself cool, the shape of the water inlet protecting the water from the eifects'of the exhaust until it is spread over the dome 13. The introduction of the exhaust as tangentially to the practically spherica? shell, gives to the gas a rotary motion before it is swept through the outlet, this sweeping normally lcarrying with it, all of the water in the muiller. Further, when the vehicle together with the muiller, is ascending a hill, it is probable that the explosive gas cannot sweep all of the water from the muffler, in which case, it is free to pass through the apertures 17 and out through this auxiliary outlet.

In place of the perforations 14, I may make use of radially disposed elongated slots, which slots I consider the equivalent of said perforations.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A substantially spherical muiller, comprising two semi-spherical parts, an inlet carried by one of said parts and an outlet carried b the other of said parts, means for securlng the parts together so that the inlet and outlet may be arranged in the same or diilerent planes, and means for introducing water to said muiller, said outlet being disposed to one side of and adjacent the bottom of the muiller, whereby water may be swept from said muiller by the explosive gases passing through said inlet.

2. A muiller having a gas inlet in the upper part thereof and an outlet in the lower part thereof, a water inlet in the top of said muffler, and a perforated dome-shaped baffle plate disposed below said water inlet, adapted to distribute water within the said muiller to be acted on by the gases passing in through said gas inlet in the muiller, and a second baille plate below the dome-shaped baille plate.

3. In a muiller, a casing having an inlet in its upper part and an outlet in its lower part, a water inlet at the top of the casing, and a plurality of baille plates in the casing, one of the baille plates being dome-.shaped and perforated and arranged below the water inlet.

4. In a muiller, a. casing having an inlet in its upper part and an outlet in'its lower part, a water inlet at the top of the casing, and a perforated bailleplate in the casing below the inlet and of a diameter approximately equal to the internal diameter 'of the said casing.

5. In a muiller, a casing having an inlet in its upper part and an outlet in its lower portion, a water Vdistributing nipple projecting into the casing, and a dome-shaped baille plate supported below the inlet of the casing and the distributing nipple and projectin slightly into the latter.

6. I a muiller, a casing having an inlet in its upper part and an outlet in its lowerV part, a water distributing nipple projecting into the casing, a dome-shaped baille plate having conical apertures and of a diameter approximately-equal to the internal diameter of the casing, and means for supporting the baille plate projecting slightly into the distributing nipple.

7. A muiller having a water inlet in the central upper portion thereof, an arched dome positioned below said water inlet, and a pipe supporting said dome, said pipe having outlet apertures therein adapted to permit the draining of water from said muffler.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERMAN SKERRY HALL. Witnesses MARCUS B. GARDNER, FRANK H. HALL. 

